Electrical control system.



PATENTED FEB. 6, 1906.

R. E. BATES. ELECTRICAL CONTROL SYSTEM.

APPLICATION FILED FEBJ, 1905.

Wirnes ses v To all whomlit mag concern:

NrTEn STATES PATENT OFFICE.

RALPH E. BATES, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO WES INGHQUSE ELECTRIC a MANUFACTURING COMBANY, A CORPORATION OF PENNSYLVANIA,

E'LE CT RIC AL CONTROL SYSTEM.

Patented Feb. :6, 1906 Application filed February 1, 1906. Serial No. 243,729.

Be'it known that I, RALPH E. Bi es; a citizen of the United States, and aresident of Wilkinsbur in the county of Allegheny and State 0 Pennsylvania, have invented a new and useful Im rovement in Electrical Control Systems, of which the following is a specification. l

My invention relates to control systems for electric motors, and particularly to con trol systems for electric motors that operate the steering-gear of ships and similar mechamsm.

' My invention has for its object to provide a control s stem for electric motors by means of which t e amount and direction of move ment of the device operated by the motors may be accurately predetermined and governed.

The single figure of the accompanying drawing illustrates a system embodying my invention.

A motor A is operatively' connected by gearing A or otherwise to a rudder-post B or the shaft or movable part of any other device the movement of which is to be accurately governed. The circuits of the motor A are governed by a controller, such as that shown at K, by means of which the field-magnet and armaturecircuits may be connected in proper relations for either forward or reverse direction of rotation of the armature and either the resistance U or the resistance U be connected inseries therewith when start ing and progressively cut out. The same controller may also serve to connect the armature-winding in a local braking-circuit with a resistance U Whenthe contact-arm K of the controller occupies itsmid-position. The contact-carrying arm K of the controller K is operated by means. of electromagnets N and N and is maintained inmid-position when neither of the electromagnets is'energized by means of springs L and L, A dashpot M is provided for preventing any sudden movement of the contact-carrying arm K that might cause injury to the motor by reason of a too rapid reduction of the amount of resistance in the motor 'circuit. One terminal of each of the windings of the electromagnets N and N is connected to a distribut to brushes H and H, respectively, which engage conductin -sectors C and C of a master controlling device F, that may be the pilot- Wheel of a ships steering-gear or a manually orautomatically operated controller employed for any other suitable and desired pur ose.

- onducting-sectors C and C are suitably mounted upon a shaft E and are insulated from each other and separated at their outer circumferences by a gap D in order that all' but one of a plurality of brushes or contactterminals G may engage therewith. The terminals G are connected, by means of conductors W, to corresponding contact-termiated by the rudder-post or controlled shaft B, is adapted to engage. The brush Q also engages a conducting-sector S, that is connected with distributing-conductor T.

If the controller occupies the position shown in the drawings, the motor A remains at rest and the rudder or "other controlled -nals R, with which a brush Q, that is oper-- member occupies its mid-position. it, however, the controller or pilot-wheel F is moved in the one direction or the other, a circuit Will be com leted from the distributing-conducnet N or that of magnet N, according to the direction of movement of said wheel, and the arm-K" will be thereby actuatedto start and regulate the operation of the motor A until the brush of finger Q makes engagement with that contact-terminal of the set R that is connected to the terminal of the set G, which is in line with the gap D, when the motor will stop. To illustrate, we will assume that the wheel F is operated to turn the sectors 0 and C contraclockwise until the ga D is brought opposite the contact-terminal wi be thus. established from distributingconductor T through the winding of electro- A circuit magnet N, conductor P, brush H, conductor segment 6, contact-terminals G and R, brush Q, and conducting-sector S to distrib uting-conductor 'l". The energized electromagnet N operates controller-arm K, and the motor A is caused to rotate in the proper direction to move brush Q toward contactterminal R that is connected with contactterminal V of contrbller F. During rotation of the shaft or post B the circuits remain similar to that just described, except that-as 8o tors T throu h either the winding of magmagnet N is interru ted, owing to the fact that contact-termina V, now occupying gap D,- does not engage conducting-sector C of controller- F, and the arm K of controller K is therefore returned to its mid-position by the spring L and the motor A stops.

The operation of the system is similar to that just described when the master 'controller F is moved to any other position in the same direction, and when the controller F is moved in the opposite direction to that described the operation of the system is'the same, exce t that the electroma net'N, the conductor the brush H, and t e sector C become eflective, and the field-magnet and armature-circuits of the motor A are connected in such relation that the motor is caused to-operate in the opposite direction.

I claim as my inventionv 1. The combination with a source of electrical ener a motor, a controlled member operated t ereby, and a controller forv said motor, of electromagnets for operating said controller, a master-controller comprising a plurality of terminal pieces, and conducting- .segments that are res ectively connected to the windings of said e ectronfagnets and that are separated and insulated from each other and engage all but one of said terminal pieces;

terminal pieces that are respectively connected to the terminal pieces of the master'- controller; and means 0 erated by said controlled member for maliing circuit connections with said terminal pieces, the circuits of the said magnet-windings being interrupted when connection is made with the terminal that is connected with the idle terminal of the aforesaid controller.

'2. The combination with a source of electrical ener y, a motor, a controlled member operated t ereby, and a' controller for said motor, of electromagnets for operating said controller, a master-controller comprising a plurality of terminal pieces and conductingsegments that are res ectively connected to the windings of said e ectromagnets and that are'separated and insulated from each other and engage all but one of said terminal pieces, and a controller comprising a plurality of terminal pieces that are respectively connected to the terminal pieces of the master-controller, and means operated by said controlled member for making circuit connections with said terminal pieces.

In testimony whereof I have hereunto subyscribed my name this 28th day of January,

. RALPH E. BATES.

Witnesses: I

Orro S. SCHAIRER, BIRNEY Burns. 

